To everyone saying this card is "playable", do any of you have any idea how good this card is when you keep it in your hand ? How many cards have you kept for the entire game in order to be sure to get the most value from it ? Right. You just don't realize how good this card is because its value gets consistently better.

There are many situations where you're forced to sacrifice a lot of cards to get a board clear, or to get rid of an insane threat, and this card can greatly keep in handy assuming you've kept it long enough.

Just don't play that card as soon as you can. Consider it like it's a 6+ mana minion, only then you can feel that's a good card.